Tool for expanding and flanging pipe.



PATENTED AUG. 2, 1904.

L. D. LOVBKIN.

TOOL FOR EXPANDING AND FLANGING PIPE.

APPLICATION FILED JULY 10, 1903.

N0 MODEL.

INVEN Ton [MIX N ATTEST Tito. 766,633.

I NITED STATES Patented August 2, 1904.

PATENT OFFICE.

TOOL FOR EXPANDING AND FLANGING PIPE.

SPECIFICATION forming part of Letters Patent. No. 766,633, dated August2, 1904.

Application filed July 10, 1903. Serial No. 164,932, (No model.)

To rail 111700771, it nan/y concern:

Be it known that I, LUTHER DANIEL Love- Kix, of the city and county ofPhiladelphia, State of Pennsylvania, have invented an Improvement inTools for Expanding and Flanging Pipe, of which the following is aspecification.

My invention has reference to tools for expanding and flanging pipe; andit consists of certain improvements, which are fully set forth in thefollowing specification and shown in the accompanying drawings, whichform a part thereof.

My invention is more particularly an improvement upon the type ofHanging-machine set out in Letters Patent to me, No. 682,726, datedSeptember 17, 1901, and is distinguished therefrom principally inexpanding and flanging rollers and the manner of supporting andoperating them.

In carrying out my invention 1 provide a suitable mandrel adapted to beoperated in any convenient manner, the lower end of which is furnishedwith expanding-rollers which are preferably made slightly tapered.\Vithin the mandrel I arrange a follower carrying upon its lower end atapered roller adapted to press upon the expanding-rollers for thepurpose of causing them to spread the work may require and also toreduce their resistance to rotation upon their own axes. The structureis designed to secure the desired results with the least expenditure ofpower and also with the simplest practicable construction of theoperative parts making up the organized tool. The mandrel is furtherprovided with tapered Hanging-rollers located uponits outersurfaceataconsiderable distance from its end for the purpose of flanging thefree edges of the expanded tube end, and thereby secure it in positionwithin a pipe-flange. The flanging-rollers are adjustably supported andrest against a central roller carried by the follower. These taperedfollower-rollers are, moreover, supported by a follower-shaft in such amanner that their end thrust may be taken up by antifriction devices.The follower is arranged to be fed gradually in a longitudinal directionthrough the mandrel to shift the position of the follower-rollersrelatively to the expanding and flanging rollers, and its movement maybe secured and regulated by hand manipulation, as pointed outhereinafter.

The details of construction will be better understood by reference tothe drawings, in which Figure 1 is a sectional elevation of an expandingand Hanging tool embodying my invention. Fig. 2 is a cross-section ofthe same on line 2 2. Fig. 3 is an inverted end view of the tool, andFig. I is an elevation of a substitute collar.

(1 7) represent the mandrel, which is in the main a cylindrical bodyhollow or tubular on the lower part and having its upper portion aterminating in a tapered shank w, adapted to be received and held in thetailstock of a turretlathe or other tool suitable for the purpose ofsupporting it. The particular shape of the shank is immaterial and wouldbe made to suit the tool available. The mandrel-body is made of twoparts secured together at c. The portion (I of the mandrel is slotted,and the upper portion of its body immediately above the slot isscrew-threaded and provided with a nut w. A controller-ring providedwith suitable handles or parts for the operator to grasp, is looselysleeved over the mandrel-body and journaled in bearings on the mandrel aand on the nut w. In this manner the controller-ring may be freelyrotated for purposes to be set out later on. The mandrelbody is boredthrough almost to the shank a and is fitted with a vertically-adjustablefollower-shaft g, having at its upper end a transverse key K, which isguided in the vertical slots of the mandrel, so as to prevent it fromturning within the mandrel, the ends of said key projecting beyond themandrel-body and connecting with the controller-ring by means ofscrew-threads upon the outer ends of the key engaging screw-threads m onthe internal face of the ring. It will now be seen that by turning thecontroller-ring while the mandrel is stationary the follower-shaft willbe caused to move longitudinally through the mandrel.

The lower end of the follower-shaft g is reduced in diameter to form aspindle, as at g,

and is extended downward into the space at 0 the lower part of themandrel. This reduced portion constitutes a spindle,,upon which isloosely sleeved conical or tapered rollers Z and 72 the taper of whichis downward or toward the end of the mandrel. removed from the spindlewhen necessary by removing a nut 29 on the end of the spindle and whichnormally holds the tapered rollers in place. As these rollers aresubjected to heavy strain in an upward direction, I find it mostimportant to provide means to take this thrust with the least possibleliability of wear from friction. To this'end I provide the follower witha series of antifriction-rings h of a diameter preferably equal to thediameter of the larger or body portion of the follower and encirclingthe spindle 9 thereof, so as to be interposed between the end of thelarger portion of the follower and the end of the roller it.

The lower end of the part Z) of the mandrel is provided withexpanding-rollers, preferably three in number, said rollers beingtapered with the taper directed upward. They are held againstdisengagement by screws entering recesses on their lower ends.

As the taper on the rollers j is inversely that upon the followerroller6, it is evident that as the former roll upon the latter in theexpanding operation the outer or active faces or expanding-surfaces areparallel to the axis of the follower, and consequently the expanded tubeor pipe will retain a cylindrical shape during the expanding operationand at its completion.

At some distance above the rollers 7' the outer portion of the mandrelportion 6 is pro vided with a conical swelling, which is slotted atpreferably three places equidistant about the mandrel and desirably outof longitudinal alinement with the expanding-rollers j. The slots openthrough the mandrel into the hollow space within the same. These slotsare fitted with adjustable flanging-rollers (Z, which are recessed upontheir upper ends and held in place by screwsf. These flanging-rollersrest against the thrust-roller 72 The outer or flanging surface of theserollers (Z is tapered longitudinally of the roller, giving them aconical shape, so as to cause the metal of the tube to be flanged in theform of a conical surface, as clearly shown in Fig. 1. While I preferthis type of flanging-roller, I do not confine myself thereto, as theflanging may be done in other shapes to suit the character of the workto be performed.

To reduce the friction and take up the thrust of the flanging-rollers(Z, I provide the abovementioned conical antifriction or thrust rollerit. The flangingrollers (Z press at points equidistant upon this rollerIt, thus centralizing it. As it is pressed upward this end thrust isreceived upon the antifriction-collars 72 Secured to the side of themandrel Z) is a trimming tool or cutter s for the purpose of The rollermay be.

I outwardly-extending edge of the tube.

trimming the edge of the flanged pipe or tube to make it true with thesurface of the pipeflange, as shown in Fig. 1, so that two such pipesand flanges maybe clamped tightly together.v This trimming tool orcutter s is clamped to the mandrel by a screw extending end of themandrel for thin tubes than for thick ones. The form of the cutter -maybe varied to suit the requirements of the work.

In Fig. 1 is shown the end of the pipe or tube 0 to be expanded andflanged in the ring or flange r. This flange is properly turned andformed with the annular tapered end. These parts are clamped in theface-plate of the lathe and adapted to be rotated. The end of themandrel Z is then inserted into the tube, and while the latter rotatesthe controller-ring Z is turned by hand, with the object of moving thefollower and its roller 7: toward the tube and the expanding-rollers 1'within it. The result of this is that the metal of the tube 0 isexpanded to fit tightly into the bore of the flange r, as shown at t inFig. 1. In this operation the rollers rotate by frictional contact with.the pipe or tube and their rotation is accomplished with but littlefriction first, because of the freedom to rotation of the roller 2' ofthe follower, due to the use of the antifriction rings or collars Z1,and, secondly, because the thrust of the rollers j is received upon arotating body. When the expansion of the tube has been completed, thecontroller-ring is rotated in a reverse direction and the pressure bythe rollers j is relieved. The roller 2' may then be removed and, ifdesired, the collar or sleeve 2', Fig. 1, substituted. The mandrel is,then advanced within the tube and guided thereby until. theHanging-rollers (Z touch the The tail-stock and tool may then be movedgradually toward the tube and flange r, and the result is that therollers (Z gradually flange outwardly the edge of the tube, causing itto fit tightly down upon the conical edge of the flange-ring. Instead,however, of moving the mandrel and the rollers (Z forward to flange thetube the mandrel g and thrust-roller Z2,

Now while I have described my invention as adapted to be used in thelathe of the turret or other suitable type it is to be understood thatthe same results can be secured by revolving the tool and holding thepipe or tube stationary, or both may have rotary motion given to them.My invention is independent of the particular means employed for holdingthe tool and is not to be restricted thereby.

\Vhile I prefer the construction shown as being excellently adapted forthe purposes of my invention, I do not limit myself to the details, asthey may be modified without departing from the spirit of the invention.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows:

1. In a tool for Hanging pipe, the combination of a hollow mandrel,outwardly-adjustable flanging-rollers extending through the mandrel androtating on oblique axes and presenting oblique operating-surfaces, aconical thrust-roller within the mandrel and adapted to spread theHanging-rollers, a longitudinally -adjustable follower-shaft adapted tomove the thrust-roller longitudinally in the mandrel, and means foradjusting the follower-shaft.

2. In a tool for Hanging pipe, the combination of a hollow mandrel,outwardly-adjustable Hanging-rollers extending through the mandrel androtating on oblique axes and presenting oblique operating-surfaces, aconical thrust-roller within the mandrel and adapted to spread theHanging-rollers, a longitudinally-adjustable follower-shaft adapted tomove the thrust-roller longitudinally in the mandrel, expanding-rollersarranged in the lower end of the mandrel, a thrust-roller for theexpanding-rollers also carried by the followershaft, and means foradjusting the follower-shaft.

3. In a tool for Hanging pipe, the combination of a hollow mandrel,outwardly-adjustable Hanging-rollers extending through the mandrel androtating on oblique axes and presenting oblique operating-surfaces, aconical thrust-roller within the mandrel and adapted to spread theHanging-rollers, a longitudinally-adjustable follower-shaft adapted tomove the thrust-roller longitudinally in the mandrel, expanding-rollersarranged in the lower end of the mandrel, a thrust-roller for theexpanding-rollers also carried by the follower-shaft and resting againstthe thrustroller of the Hanging-rollers, antifriction-collarssurrounding the follower-shaft and between a shoulder upon it and thethrust-roller of the Hanging-rollers, and means for adjusting thefollower-shaft.

4:. A tool for Hanging pipe consisting of a mandrel made hollow at itslower end, combined with outwardly adjustable Hangingrollers havingoperating-surfaces greatly inclined relatively to the axis of themandrel, a longitudinally-adjustable follower-shaft having a shoulder, aconical follower or thrustroller carried by the follower-shaft forspreading the Hanging-rollers, and antifriction collars or ringsinterposed between the conical follower or thrust-roller and theshoulder of the follower-shaft.

5. In a tool for Hanging pipe, the combination of a hollow mandrel,outwardly-adjustable Hanging-rollers extending through the mandrel androtating on oblique axes and presenting oblique operating-surfaces andform ed with recessed ends, screws carried by the mandrel and whose endsextend down into the recessed ends of the rollers, a conicalthrustroller within the mandrel and adapted to spread theHanging-rollers, a longitudinallyadjustable follower-shaft adapted tomove the thrust-roller longitudinally in the mandrel, and means foradjusting the follower-shaft.

6. A tool for Hanging pipe consisting of a mandrel made hollow at itslower end, combined with outwardly-adjustable Hangingrollers havingoperating-surfaces greatly inclined relatively to the axis of themandrel, a longitudinally-adjustable follower-shaft having a shoulder, aconical follower or thrustroller carried by the follower-shaft forspreading the Hanging-rollers, antifriction collars or rings interposedbetween the conical follower or thrust-roller and the shoulder of thefollower-shaft, and a trimming-cutter secured to the mandrel adjacent tothe Hanging-rollers.

7. In a tool for Hanging pipe, the combination of a hollow mandrel,outwardly-adjustable Hanging-rollers extending through the mandrel androtating on oblique axes and presenting oblique operating-surfaces, aconical thrust-roller within the mandrel and adapted to spread theHanging-rollers, a longitudinally adjustable follower-shaft adapted tomove the thrust-roller longitudinally in the mandrel, means foradjusting the followershaft, and a trimming device secured to the bodyof the mandrel in transverse alinement with the Hanging-rollers.

In testimony of which invention I hereunto set my hand.

LU HER DANIEL LOVEKIN.

WVitnesses:

R. M. KELLY, WM. RODNEY.

IIO

